Coal jig



A 1,448,668 M. P, LEWELLEN ET AL Mar. 13, 1923.

GOAL JIG 1921 4 sheets-sheet 2 Filed Oct. 10

anoentozd m0 L L0 mm P H Mar; 13, 1923. 1,448,668

v M. P. LEWELLEN ET AL COAL JIG v Filed Oct. 10, 1921 4 sheets-sheet 4 w INVENTOHS M I? LEWELLEN Gamay Patented Mar. 13, 1923.

' uNirEo srars reacts emaicrew-3 MORO PHILLIPS LEWELLEN AND HAIR-RY s. ARNOLD, or CAMDEN, new JERSEY.

' COAL JIG.

To all whom it may concern:

Be it known that we, Mono PHILLIPS LEWELLEN and HARRY S. ARNOLD, citizens of the United States, residing at Camden, in the county of Camden and State of New Jersey, have invented certain new and useful Improvements in Coal Jigs, and we do declare the following to be a'iiull, clear, and exact description or the invention, such'as will enable others skilled in the art to which it appertains to make and use the same.

Our'inve'ntion relates to improvements in coal jigs of the type in which the coal is separated from the rock and slate by a gravitation process carried out upon a grating within a tank, the principal object of the invention being to provide an improved construction of parts for controlling the discharge of rock.

In carrying out the above end, a further aim is to provide a unique form of easing extending entirely across the usual water tank at the delivery end of the grating and associated with this grating in a unique manner for quickly discharging the accumulated rock and slate when the usual gate is opened, the construction being such that the full width of the grating may be cleared of the rock and slate without necessitating that they travel through a comparatively small outlet'opening at one side of the tank, as is necessary with a number of machines.

A further object is to mount a coal discharge chute upon the upper edge of the vertically movable gate which controls the dis charge-oi? slate and rock, whereby the weight of the coal discharged through said chute will materially assist in closing the gate after the discharge of rockand slate has taken place.

ivith the foregoing in view, the invention resides in the novel subject matter hereinafter described and claimed, the descriptive matter being supplementedby the accompanying drawings.

Figure 1 is a top plan view of an ore jig constructed in accordance with our' invention. l

Figure 2 is a side elevation.

Figure 8 is a longitudinal sectional view as indicated by the line 3-3 of Fig. 1.

Figure 4. is an elevation of the discharge end of the machine.

Figure 5 is a vertical transverse sectional view as indicated by the lines 5-5 of Figs. 2 and 3.

Figure 6" is a detail side elevation showing the means for operating the rock and slate discharge gate and holding it in any desired position.

In the drawings above briefly described, the numeral 1 designates the well known water tank provided at its upper portion with a transverse partition Qbehind which a plunger 3 is operated from the usual overhead drive shaft t,'said plunger being bypreference provided with check valves 5 which permit quick return thereof;

At the side of the partition 2 opposite the plunger 3, the usual or any well known grating 5 is provided, upon whichthe coal is separated from the slate and rock. A suitable'feed gate 6- is slidably mounted over the inner portion of the grating 5 and may be vertically adjusted'by means of abandcrank 7 threaded on a central bolt .8 which rises from the gate. The lower portion of the tank 1 is provided with an appropriate I man-hole 9 and with a slush outletlO, the latter being provided with a suitable valve 11 connected by a link 12 with a bell-crank 13 fulcrumed at one side of the tank. Another link 14 rises from the bell crank and is pivoted to a control lever 15..

Extending transversely across the discharge end of the machine is a rock and slate discharge casing 16 which is shown most clearly in Figs. 3 and 5. the outer side 'wall 17 of saidcasing'being in contact with one end 18 ot the tank 1, while the inner side wall 19 of said casing is in abutting relation with the delivery end of the grating 5, said wall=19 being provided with an inlet slot 20 extending throughout the width of the grating 5 and adapted to permit the discharge of slate and the like from said grating into the casing. The end walls 21 ot the casing 16-are in contact with opposite sidesot the tank 1 and are secured thereto by means of bolts or the like 22 extending through flanges 23 with which 'saidehd walls are provided. Oneof thewalls 21 is equipped; with a slate'androck outlet spout Qawhich said gate being in contact with the wall 19 of the casing to either closeits opening 20 or expose the latter to any desired de gree. Appropriate guides 27 are employed for the gate 26 and said gate is connected by links 28 to crank arms 29 on a rock shaft 30 which extends across the machine, one end of said rock shaft being provided with an operating lever 31 which extends oppositely beyond the shaft as shown in Fig. 6. The lower end of lever 31 is provided with a pin 32 and with a suitable hand grip 33. The pin is adapted for reception in any one of the series of openings 34 to hold the gate 26 open while discharging the slate and the like from the grating 5 and the handle 33 is not only instrumental in releasing said pin, but by gripping said handle with one hand and grasping the opposite'end of the lever 31, with the other hand, the rock shaft 30 may be easily turned to open the gate against the pressure of the material resting on the grating 5.

The discharge of coaltakes place over the gate 26, through a chute 35 which is mounted on and movable vertically with said gate. When the gate is open for the discharge of slate and the like into the casing 16, the weight of the coal passing 'down the chute 35 of course has a tendency to lower said gate as soon as the pin 32 is released, thereby greatly assisting the operator in forcing said gate shut through the material passing thereunder. Furthermore, by mounting the outlet chute 85 on the gate 26, the discharge of coal need not be interfered with when said gate is open.

In order to receive the rock and slate from the. spout 24 and elevate it so that it may be dropped into a chute or other means to carry it from. the machine, we prefer to provide a vertically elongated conveyor casing 40 into whose lower end said spout discharges. The casing 40 is located at one side of the tank 1 and may be of any desired construction, although it is preferably formed of several sections bolted together as shown. Furthermore, while any suitable provision could be made for securing the casing 40 in place, we have shown it provided with feet 41 bolted to base blocks 42 which extend laterally from the frame 43 of the machine.

An endless chain 44 having perforated buckets 45 operates within the casing 40 and is trained around upper and lower guide sprockets whose shafts 4'6. and 47 are mounted in appropriate bearings, the bearings for the lower shaft being preferably adjustable through a man-hole 48, so that any slack in the chain may be taken up. The shaft 46 is driven by a sprocket chain 49 and sprockets 50 from the main drive shaft 4.

A machine constructed as herein disclosed, will be highly efficient and desirable and be. readily operated by one per son, in view of the fact that the several controls are all in the same general location, so that they may be reached with case, without the necessity of the operator walking a great deal around the machine.

Since excellent results maybe obtained from the details disclosed, they may well be followed if desired, but it is to be understood that within the scope of the invention as claimed, numerous changes may be made.

lVe claim:

1. The combination with a coal ig having a rock and coal supporting grating and an upwardly movable gate adapted to be raised to discharge accumulated rock from said grating, of a complete discharge chute for the coal carried by and immovable with respect to said gate, said chute being bodily movable with said gate; together with means including a control out of the path of the coal for vertically adjusting said gate and chute while coal is being discharged.

2. A coal jig comprising a tank, a grating in said tank upon which coal and rock are separated by gravitation, a chute-formingcasing extending across one end of said tank and having end walls secured against the inner surfaces of opposed sides of said tank, the inner side wall of said casing being disposed in abutting relation with the delivery end of said grating, said inner side wall having a rock inlet slot extending throughout the width of said grating with its lower edge substantially flush with the upper side of said grating, and a vertically movable rock discharge gate extendingacross the tank in sliding contact with said inner wall of said casing, said casing being provided with a bottom declining to one side of the tank and having a discharge spout extending through said side.

In testimony whereof we have hereunto set our hands.

MORO PHILLIPS LEVVELLEN. HARRY S. ARNOLD.

lVitnesses CHAs. G. KAY. ANNA M. SoHMITz. 

